China's regimen is a science that studies the law of human life, discusses how to improve human health, resist premature aging and reach the natural limit of human life under the guidance of China's unique philosophy. Its basic task is to correctly prompt the law of human life, the natural law of the universe and the relationship between man and nature, find out various internal and external factors that endanger human health and life, and provide correct theories and methods for human beings to engage in healthy and longevity activities.

In the long historical process of thousands of years' occurrence, development and formation, China's health preservation has made great contributions to the prosperity of the Chinese nation and people's health and longevity. Its theory and method are not only inherited and developed in China, but also valued and utilized by many countries in the world.

Just as food is the most important thing in hair, so are food, color and sex. It is also the wisdom of the Chinese nation. In the regimen of China, diet regimen and room regimen both occupy a considerable proportion. In that age when men and women were not close, health experts from different schools in the past dynasties broke through the shackles of feudal concepts, made unremitting explorations, accumulated rich experience and summed up a complete set of theories. These theories and experiences not only played a positive role in ancient people's health care activities, but also have great reference value for today's sex science and medicine (including family planning, prenatal and postnatal care, disease prevention and anti-aging, etc.). ). These colorful home health knowledge are scattered in works of various schools. It is an essential work link to comprehensively excavate and sort out these historical documents that shine with the wisdom of ancient orientals and provide them to contemporary scholars for research and utilization to the maximum extent. It is for this purpose that we have edited the book "Secrets of Ancient Indoor Health Care in China" in order to provide more original documents for researchers to use. However, it must be pointed out that due to the limitation of social system and scientific level, the cognitive ability of the ancients is bound to be limited. As Dr. Wu Jieping said: "Other ancient civilizations in the world, such as ancient India, ancient Greece and ancient Egypt, have also left a lot of precious documents and materials on sexual exploration and research, such as Proverbs of Kama in India, Fragrant Garden in Arabia and Art of Love by Ovid in Rome. Like all cultural heritages, these documents are the summary of ancient human sexual behavior and the crystallization of ancient wisdom. However, due to the limitation of historical conditions, they are inevitably limited, the essence and dross coexist, and science and superstition coexist.

Because human understanding of the development process has the same regularity, it is impossible for our ancient cultural heritage to go beyond the limitations of history. Many documents also coexist with essence and dross, and science and superstition coexist. In order to provide researchers and related readers with complete ancient literature on indoor health preservation, this book also includes some chapters that are mixed with feudal superstition and even violate science and social morality, such as resisting women, changing female fetus into male fetus, cultivating talents, replenishing essence and returning brain, and alchemy. We are convinced that the readers of this book can treat the ancient cultural heritage correctly from the perspective of historical materialism and dialectical materialism, take its essence and discard its dross.